Flaring and burnishing tool



y 26, 1966 A. M. SAMUELS ETAL 3,262,298

FLARING AND BURNISHING TOOL Filed Feb. 4, 1964 f7ZU67Z 9715 Abra/ m Msdm 5 {5 56726 B. al

United States Patent 3,262,298 FLARING AND BURNISHING TOOL Abraham M.Samuels, Chicago, and Eugene B. Shapiro,

Skokie, 111., assignors to Chicago Specialty Manufacturing Co., Skokie,111., a corporation of Illinois Filed Feb. 4, 1964, Ser. No. 342,483 6Claims. (Cl. 72-117) This invention relates to improvements in a flaringand burnishing tool.

One of the objects of this invention is to provide a flaring andburnishing tool in which the flaring head is coupled to the rotatingshaft so as to rotate with the shaft and be capable of movement axiallywith respect to the shaft and in which the yieldable means is supportedin the flaring head.

Another object of this invention is to provide a tool which will flare atube by the rotation of the shaft in one direction and will burnish theflared end of the tube by automatically maintaining the flaring tool inengagement with the tube during the rotation of the flaring tool in theopposite direction, and in which the yieldable means are supported inthe flaring head closely adjacent the tube end.

Another object of this invention is to provide a flaring and burnishingtool which is highly efiicient in operation and economical to produce.

Other objects will become apparent as this description progresses.

In the drawings:

FIG. 1 is an elevational view, partly in section, of the tool of thisinvention, with the end of the tube clamped in position for flaring.

FIG. 2 is an enlarged longitudinal sectional View with the tool inflaring position, and

FIG. 3 is a view similar to FIG. 2 but with the tool in burnishingposition.

The tool includes a frame member generally indicated at which is of agenerally C-shaped configuration in side elevation, having a top portion12 with a connected rear side portion 13 and a bottom 14 having spacedlegs 15 which form the supports. The top 12 has a central internallythreaded bore 16 to accommodate an externally threaded shaft 18. Theshaft 18 has a handle 20 rigidly secured to it at its upper end so thatthe shaft may be manually rotated by said handle and thereby move theshaft axially in said bore.

The lower end of shaft 18 is provided with a shaft portion 22 of reduceddiameter and a continuing shaft portion 23 of a further reduced diameterwhich provides a shoulder 24 between the shaft portions 22 and 23. Bothsaid shaft portions are unthreaded. The end wall 25 of shaft portion 23forms a stop member, as will be subsequently described. Fixed to theshaft portion 22 is a transverse pin 26, the sides of which extendlaterally of the shaft.

A tube flaring member generally indicated at 27 includes a cone-shapedmember 28 provided with a central bore or recess 30 for receiving thelower end of the shaft portion 22 and the shaft portion 23. The conemember has spaced transversely extending alined openings or slots 32which receive the opposite ends of the pin 26. A coiled compressionspring 34 is positioned in the bore 30 of the cone member 28 around theshaft portion 23, with one end of the spring bearing against the insidetapered wall 36 of the cone member 28 and the other against the shoulder24 of the shaft. The transverse openings or slots 36 in the cone arelarger than the diameter of the pin to permit a relative axial movementof the cone member 28 relative to the shaft 18 and a rotative movementtherewith. The spring 34 will normally urge the cone "ice member in adirection outwardly or away from the end of the shaft 18 and the pin 26will engage the upper inside wall of the slot 32 for limiting outwardaxial movement of the cone member 28 relative to the shaft 18. The endwall 25 of the shaft 18 is the stop means engageable by the cone member27 when the cone is urged upwardly in the flaring operation.

While the pin 26 is shown supported on the shaft, and the cone memberhas the slots 32 to accommodate the pin, it will be understood that samemay be reversed, namely, that the pin may be secured to the cone memberand the shaft may be provided with a transverse slot to looselyaccommodate the pin. In either arrangement the pin 26 is inserted andthe attachments made as aforesaid after the spring 34 and the end of theshaft are inserted in the bore of the cone.

The operation briefly described is as follows.

The tube T to be flared and burnished is placed in a conventionalclamping means or split-type clamping block, generally indicated at 40,having the usual tapered surface 42. The tube clamping means and tubeare sup ported in the frame 10, as shown in FIG. 1, with the clampingmeans resting on the spaced legs 15 and the tube T extending downwardlybetween the legs. The shaft 18 is rotated by the handle 20 for movingthe shaft axially with respect to the frame 10. The clockwise rotationof the shaft 18 will cause the cone member 28 to engage the end of thetube T and the cone member will move inwardly compressing the spring 34until the inside tapered wall 36 of the cone member engages the end wall25 of the shaft 18, which limits the inward movement of the cone memberor flaring tool and causes the flaring cone to flare the end of thetube, as shown in FIG. 2.

Upon the reverse or counterclockwise rotation of the shaft 18 throughthe rotation of the handle 20, the shaft will move axially away from thetube T, yet the spring 34 will expand and push against the cone member28, causing the cone member 28 to move in an outwardly direction andthereby urge the cone member 28 to remain in contact with the flaredtube T and burnish the flared tube until the shaft 18 has been rotatedcounterclockwise sufficient-ly to withdraw the cone member 28 from itscontact with the flared tube. Thus, with the initial reverse orwithdrawal rotation of the shaft 18 the cone member remains in contactwith the flared tube to effect the burnishing operation.

It will be understood that various changes and modifications may be madefrom the foregoing without departing from the spirit and scope of theappended claims.

What is claimed is:

1. A tube flaring and burnishing tool comprising a Q frame member havinga threaded bore through one portion thereof and a support portionadapted to have a tube end supported therein in alinement with saidthreaded bore, an externally threaded shaft engaged in said threadedbore for rotative and axial movement relative to said frame, tubeflaring and burnishing means including a cone, said cone having a borewith the end of said shaft secured within said bore, coupling said coneto said shaft secured within said bore, coupling means for coupling saidcone to said shaft for permitting axial movement of said cone withrespect to said shaft but rotative movement therewith, spring meanspositioned within said bore between said cone and said shaft, a handlefor rotating said shaft and said cone in either direction to advance orretract said shaft, said spring means normally urging said coneoutwardly, said coupling means limiting the outward movement of saidcone, said shaft having means engaging said cone for limiting the inwardmovement of said cone relative to said shaft when the shaft is advancedand said cone is in tube flaring operation, said spring means forcefullymaintaining said cone urged against the tube to effect a burnishingthereof during retracting rotation of said shaft until said conedisengages from the tube.

2. A structure defined in claim 1 in which the coupling means include apin on the shaft and a slot in the cone engageable by said pin.

3. A structure defined in claim 1 in which the coupling means include apin member and a slot member movable with respect to each other, withone of said members on the shaft and the other on the cone.

4. A structure defined in claim 1 in which the spring means is aresilient member.

5. A structure defined in claim 1 in which the shaft has a portion of areduced diameter extending within the bore of the cone and adapted toengage an inside wall in the bore of the cone for limiting the inwardmovement of the cone relative to the shaft.

6. A structure defined in claim 5 in which the spring is around thereduced diameter portion of the shaft.

References Cited by the Examiner UNITED STATES PATENTS CHARLES W.LANHAM, Primary Examiner.

1. A TUBE FLARING AND BURNISHING TOOL COMPRISING A FRAME MEMBER HAVING ATHREADED BORE THROUGH ONE PORTION THEREOF AND A SUPPORT PORTION ADAPTEDTO HAVE A TUBE END SUPPORTED THEREIN IN ALINEMENT WITH SAID THREADEDBORE, AN EXTERNALLY THREADED SHAFT ENGAGED IN SAID THREADED BORE FORROTATIVE AND AXIAL MOVEMENT RELATIVE TO SAID FRAME, TUBE FLARING ANDBURNISHING MEANS INCLUDING A CONE, SAID CONE HAVING A BORE WITH THE ENDOF SAID SHAFT SECURED WITHIN SAID BORE, COUPLING SAID CONE TO SAID SHAFTSECURED WITHIN SAID BORE COUPLING MEANS FOR COUPLING SAID CORE TO SAIDSHAFT FOR PERMITTING AXIAL MOVEMENT OF SAID CORE WITH RESPECT TO SAIDSHAFT BUT ROTATIVE MOVEMENT THEREWITH, SPRING MEANS POSITIONED WITHINSAID BORE BETWEEN SAID CONE AND SAID SHAFT, A HANDLE FOR ROTATING SAIDSHAFT AND SAID CONE IN EITHER DIRECTION TO ADVANCE OR RETRACT SAIDSHAFT, SAID SPRING MEANS NORMALLY URGING SAID CONE OUTWARDLY, SAIDCOUPLING MEANS LIMITING THE OUTWARD MOVEMENT OF SAID CONE, SAID SHAFTHAVING MEANS ENGAGING SAID CONE FOR LIMITING THE INWARD MOVEMENT OF SAIDCONE RELATIVE TO SAID KSHAFT WHEN THE SAFT IS ADVANCED AND SAID CONE ISIN TUBE FLARING OPERATION, SAID SPRING MEANS FORCEFULLY MAINTAINING SAIDCONE URGED AGAINST THE TUBE TO EFFECT A BURNISHING THEREOF DURINGRETRACTING ROTATION OF SAID SHAFT UNTIL SAID CONE DISENGAGES FROM THETUBE.